Metals and Materials International最新文献_第5页

The Effect of Non-metallic Si Content on the Corrosion Resistance of CoCrFeNiSiX High-Entropy Alloy in Molten Salt at 900 °C 非金属Si含量对CoCrFeNiSiX高熵合金900℃熔盐耐蚀性的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-20 DOI: 10.1007/s12540-025-02148-7

Lei Wang, Wenyu Tang, Xuancheng He, Qing Dong, Yuhang Guo, Ye Cheng, Weiguo Yang

{"title":"The Effect of Non-metallic Si Content on the Corrosion Resistance of CoCrFeNiSiX High-Entropy Alloy in Molten Salt at 900 °C","authors":"Lei Wang, Wenyu Tang, Xuancheng He, Qing Dong, Yuhang Guo, Ye Cheng, Weiguo Yang","doi":"10.1007/s12540-025-02148-7","DOIUrl":"10.1007/s12540-025-02148-7","url":null,"abstract":"<div><p>This study investigates the hot corrosion behavior of CoCrFeNiSiₓ high-entropy alloys (x = 0.1, 0.3, 0.5) in a molten salt (75 wt% Na<sub>2</sub>SO<sub>4</sub>+25 wt% NaCl) at 900 °C. Increasing the Si content refines the microstructure from coarse dendrites to equiaxed and columnar grains. At x = 0.5, a significant amount of face-centered cubic (FCC) structure phase and minor body-centered cubic (BCC) structure phase precipitate, indicating Si promotes element segregation and secondary phase formation. The Si = 0.5 alloy possesses the best resistance, exhibiting the lowest mass gain (21.5 mg/cm<sup>2</sup>) and thinnest corrosion layer (~ 100 μm) after 100 h. Its corrosion rate decelerated significantly in the later stage, suggesting the formation of a protective surface scale. Analysis shows that Si addition substantially alters the intermediate corrosion layer composition. At Si = 0.5, a dense, continuous SiO<sub>2</sub> layer forms, acting as an effective barrier against sulfur and chlorine penetration and suppressing internal sulfidation. The outer layer consists mainly of spinel oxides and sodium-containing compounds (e.g., Na<sub>4</sub>Fe<sub>2</sub>O<sub>5</sub>). Silicon suppresses the formation of detrimental sodium salt oxides, thereby improving the scale’s density and protectiveness. In conclusion, silicon enhances the molten salt corrosion resistance of CoCrFeNiSiₓ HEAs by facilitating the formation of a protective SiO<sub>2</sub> layer, providing valuable support for their potential application in high-temperature corrosive environments.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"3132 - 3148"},"PeriodicalIF":4.5,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrahigh Strength and Exceptional Ductility in a Bimodal-Grain-Structured Co–Cr–W–Ni Alloy at Cryogenic Temperature 低温下双峰晶型Co-Cr-W-Ni合金的超高强度和卓越延展性

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02137-w

Yanming Chen, Changshun Wang, Chenglin Li

{"title":"Ultrahigh Strength and Exceptional Ductility in a Bimodal-Grain-Structured Co–Cr–W–Ni Alloy at Cryogenic Temperature","authors":"Yanming Chen, Changshun Wang, Chenglin Li","doi":"10.1007/s12540-025-02137-w","DOIUrl":"10.1007/s12540-025-02137-w","url":null,"abstract":"<div><p>The pursuit of simultaneous high strength and ductility in metallic materials remains a critical challenge for engineering applications, particularly at cryogenic temperatures where conventional alloys often exhibit embrittlement. In this study, we demonstrate that an L-605 cobalt-based alloy (Co–20Cr–15 W–10Ni, wt%) with a carefully engineered bimodal grain structure—comprising fine grains (FGs) and coarse grains (CGs)—exhibits exceptional strength-ductility synergy at cryogenic conditions. The alloy achieves an ultimate tensile strength exceeding 1.7 GPa, a yield strength above 1.1 GPa, and a uniform elongation over 45%. These outstanding mechanical properties originate from two synergistic mechanisms: (1) Cryogenic temperature effects: Enhanced solid-solution strengthening, grain boundary hardening, and dislocation interactions, coupled with γ→ε martensitic transformation triggered by reduced stacking fault energy. (2) Heterostructure effects: Accelerated martensite formation due to plastic strain incompatibility between fine grains (FGs) and coarse grains (CGs). Both mechanisms contribute to substantial work hardening, enabling simultaneous high strength and ductility. Our findings highlight bimodal grain structure engineering as a promising strategy for designing high-performance cryogenic structural materials.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"2954 - 2965"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Annealing-Induced Evolution of Band-Like B2 Phase in Hot-Rolled Fe–16Mn–10Al–5Ni–0.86C Steel and Its Role in Strength-Ductility Balance 热轧Fe-16Mn-10Al-5Ni-0.86C钢退火诱导带状B2相的演化及其在强度-塑性平衡中的作用

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02155-8

Yuanjiu Huang, Tae-Hoon Kang, Han-Soo Kim, Kee-Ahn Lee

{"title":"Annealing-Induced Evolution of Band-Like B2 Phase in Hot-Rolled Fe–16Mn–10Al–5Ni–0.86C Steel and Its Role in Strength-Ductility Balance","authors":"Yuanjiu Huang, Tae-Hoon Kang, Han-Soo Kim, Kee-Ahn Lee","doi":"10.1007/s12540-025-02155-8","DOIUrl":"10.1007/s12540-025-02155-8","url":null,"abstract":"<div><p>Controlling the B2 phase in hot-rolled Fe–Mn–Al–Ni–C lightweight steels remains a significant challenge. In this study, the evolution of banded ferrite/B2 structures in hot-rolled Fe–16Mn–10Al–5Ni–0.86C steel was systematically investigated under different annealing temperatures (800 °C and 900 °C) and holding times. The banded ferrite/B2 phases exhibited a three-stage size evolution during annealing, characterized by initial coarsening, subsequent refinement, and re-coarsening. After 30 min of annealing, the banded structures reached their minimum size at both temperatures. The sample annealed at 800 °C (A800) contained the finest banded B2 phase, leading to a high work-hardening rate but reduced ductility due to κ-carbide coarsening. In contrast, the 900 °C annealed sample (A900) developed fine intragranular B2 precipitates within the austenite matrix, achieving the best strength–ductility balance with a tensile strength of ~ 1.20 GPa and an elongation of 11.2%. These results highlight the critical role of annealing parameters in tailoring the morphology of banded B2 and optimizing the mechanical performance of Fe–Mn–Al–Ni–C lightweight steels.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"3192 - 3207"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comprehensive Experimental, Numerical, and Microstructural Study of AA6061-T6 Under Heat Assisted Incremental Sheet Forming AA6061-T6热辅助渐进式板料成形的综合实验、数值和显微组织研究

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02141-0

Viren Mevada, Manoj Wadile, Harit Raval

{"title":"A Comprehensive Experimental, Numerical, and Microstructural Study of AA6061-T6 Under Heat Assisted Incremental Sheet Forming","authors":"Viren Mevada, Manoj Wadile, Harit Raval","doi":"10.1007/s12540-025-02141-0","DOIUrl":"10.1007/s12540-025-02141-0","url":null,"abstract":"<p>This study investigates the effect of tool diameter and forming temperature on the microstructural evolution and formability of AA6061-T6 aluminium alloy in Heat Assisted Incremental Sheet Forming (HAISF). Three tool diameters (6 mm, 8 mm, and 10 mm) and three temperature levels (room temperature, <span>(150^{,circ })</span>C, and <span>(300^{,circ })</span>C) were considered, while other process parameters—including step depth (0.4 mm), spindle speed (1250 RPM), and feed rate (600 mm/min)—were held constant. A conical frustum geometry with a <span>(60^{circ })</span> wall angle and target forming depth of 30 mm was used to assess the deformation response. Microstructural evaluation via SEM and EDS revealed distinct particle fragmentation, shear band formation, and oxide development depending on the forming temperatures under various tool diameters. While the 6 mm tool enabled full-depth forming under all temperatures, the 10 mm tool led to premature failure due to matrix degradation and <span>(Mg_2Si)</span> particle loss, especially at elevated temperatures. Fracture depth, microhardness, surface roughness, sheet thinning, and geometrical accuracy were systematically analysed, showing that the 8 mm tool at <span>(150^{,circ })</span>C provided a favourable balance between formability and structural integrity. The findings highlight the critical interplay between tool size and thermal input in tailoring the ISF process for high-strength aluminium alloys.</p>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"3208 - 3233"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study of the Phase Diagram of the La-Ni–Sn System at 300 and 600 °C 300和600℃时La-Ni-Sn体系相图的实验研究

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02135-y

Ondrej Zobac, Rudolf Zizka, Klaus W. Richter, Bedrich Smetana, Simona Zla, Monika Kawulokova, Ales Kroupa

{"title":"Experimental Study of the Phase Diagram of the La-Ni–Sn System at 300 and 600 °C","authors":"Ondrej Zobac, Rudolf Zizka, Klaus W. Richter, Bedrich Smetana, Simona Zla, Monika Kawulokova, Ales Kroupa","doi":"10.1007/s12540-025-02135-y","DOIUrl":"10.1007/s12540-025-02135-y","url":null,"abstract":"<div><p>The phase equilibria of the ternary La-Ni–Sn system have been experimentally studied at temperatures of 300 and 600 °C using long-term annealed samples. The coexisting phases were characterized by scanning electron microscopy SEM and powder X-ray diffraction XRD. The phase transformation temperatures were analyzed using thermal analysis DTA or DSC methods. The LaNi<sub>5</sub> phase, which is known as a hydrogen storage material, was observed to have up to 10% tin solubility at 600 °C. At a temperature of 300 °C, there is a region of miscibility gap between 1.9 and 6.5 at% Sn which is no longer present at 600 °C. Twelve ternary intermetallic phases were found at 300 °C and eleven ternary intermetallic phases at 600 °C. None of them showed a noticeable homogeneity range. Based on the experimental data obtained, isothermal sections of the La-Ni–Sn phase diagram were constructed at 300 and 600 °C.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 8","pages":"2653 - 2666"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12540-025-02135-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of WAAM Modes and Wall Thickness on the Microstructure and Mechanical Properties of Pearlitic Heat-Resistant Steel WAAM模态和壁厚对珠光体耐热钢组织和力学性能的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02150-z

Ilya Vlasov, Antonina Gordienko, Alexander Eremin, Vyacheslav Semenchuk

{"title":"Effects of WAAM Modes and Wall Thickness on the Microstructure and Mechanical Properties of Pearlitic Heat-Resistant Steel","authors":"Ilya Vlasov, Antonina Gordienko, Alexander Eremin, Vyacheslav Semenchuk","doi":"10.1007/s12540-025-02150-z","DOIUrl":"10.1007/s12540-025-02150-z","url":null,"abstract":"<div><p>In this study, the effect of heat input on the microstructures and mechanical properties of both thin and thick walls built by wire arc additive manufacturing from the pearlitic heat-resistant steel was investigated. Both conventional gas metal arc welding and low-energy ‘coldArc’ modes were implemented in addition to forced air cooling upon interlayer pauses. It was found that forced cooling of the deposited beads down to 200 °C made it possible to limit heat accumulation. As a result, heterogeneous regions were formed inside layers, consisting of zones with elongated and quasi-equiaxed large grains in addition to finely dispersed microstructures. In the coldArc mode, the the finest microstructures were caused by high solidification rates, increasing both microhardness values and strength characteristics. In turn, the microstructure was more uniform in the coldArc thick wall due to a lower cooling rate upon its building. For the thin walls, yield strengths ranged from 670 up to 710 MPa, while ultimate tensile strengths were from 770 up to 805 MPa. These parameters increased up to 750 and 860 MPa, respectively, for the coldArc thick wall. The obtained results showed that the uniform microstructures with the improved mechanical properties could be achieved at the cooling rates of 65 and 30–40 °C/s during the deposition of beads and subsequent thermal cycles, respectively. Their greater values contributed to the formation of regions with the non-uniform microstructures, as well as limited both recrystallization and partial tempering processes.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"2935 - 2953"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Over-Aged Microstructure on Fatigue Crack Initiation and Propagation in Al–Zn–Mg–Cu Alloys 过时效组织对Al-Zn-Mg-Cu合金疲劳裂纹萌生和扩展的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02157-6

Dong-Yun Lee, Yong-You Kim, Yoona Lee, Moo-Young Seok, Beom-Rak Hong, Namhyun Kang, Hyoung-Wook Kim, Yong Hee Jo

{"title":"Influence of Over-Aged Microstructure on Fatigue Crack Initiation and Propagation in Al–Zn–Mg–Cu Alloys","authors":"Dong-Yun Lee, Yong-You Kim, Yoona Lee, Moo-Young Seok, Beom-Rak Hong, Namhyun Kang, Hyoung-Wook Kim, Yong Hee Jo","doi":"10.1007/s12540-025-02157-6","DOIUrl":"10.1007/s12540-025-02157-6","url":null,"abstract":"<div><p>This study investigated the effects of over-aging on the fatigue behavior of Al–7.3Zn–2.5Mg–1.5Cu alloy through high-cycle fatigue (HCF) and fatigue crack growth (FCG) tests. The artificial aging progress was categorized as under aging, peak aging, and over-aging. Microstructural analysis indicated that as over-aging processed, the matrix and grain boundary precipitates coarsened, and the precipitate-free zones (PFZs) widened. The over-aged alloy exhibited the highest fatigue strength of 275 MPa after 10<sup>7</sup> cycles. To understand these mechanisms were clarified by analysing, the HCF behavior, separating it into fatigue crack initiation (FCI) and fatigue crack propagation (FCP). An Analysis based on the cyclic plastic zone model revealed that increases in the precipitate size and volume fraction reduced the FCG rate. Moreover, cross-slip activation due to larger precipitates reduced the degree of localized deformation in PFZs, delaying FCI. This study systematically distinguished and analysed the FCI and FCP behaviors resulting from over-aging treatment in Al–Zn–Mg–Cu alloys, providing a foundational understanding of alloy development in the field of HCF.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"3019 - 3036"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Thermal Exposure on Fatigue Properties of 7085 Aluminum Alloy 热暴露对7085铝合金疲劳性能的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02146-9

Junwen Zhao, Jun Fan, Lei Xu, Hao Wang, Jing Han, Xingmin Huang

{"title":"Effect of Thermal Exposure on Fatigue Properties of 7085 Aluminum Alloy","authors":"Junwen Zhao, Jun Fan, Lei Xu, Hao Wang, Jing Han, Xingmin Huang","doi":"10.1007/s12540-025-02146-9","DOIUrl":"10.1007/s12540-025-02146-9","url":null,"abstract":"<div><p>This study systematically investigates the effects of thermal exposure (80–240 °C, 5 h) on the microstructure evolution and fatigue performance of T74-treated 7085 aluminum alloy, focusing on establishing quantitative microstructure-property relationship. Experimental results demonstrate that while grain size remained stable across the investigated temperature range, significant precipitate coarsening occurred above 120 °C. As thermal exposure temperature rose to 240 °C, the average precipitate radius increased by 215% (from 3.9 to 12.3 nm) accompanied by substantial degradation of mechanical properties: tensile and fatigue strength decreased by 31.8% and 42.1%, respectively. Microstructure-property correlation analysis elucidated the underlying mechanism, attributing the performance degradation to reduced resistance to dislocation motion caused by coherency loss and coarsening of precipitates. Furthermore, theoretical and experimental analyses revealed an inverse relationship between the fatigue strength and the precipitate size (<i>Δσ</i><sub>-1p</sub> ∝ r<sup>-1</sup>). These findings enable more reliable fatigue property predictions of precipitate-strengthened aluminum alloys under thermal service conditions.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"2981 - 2990"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of Ti-6Al-4 V Alloy with Excellent Ductility by Combining Multi-Directional Isothermal Forging and Warm Rolling 多向等温锻造与热轧相结合制备具有优良延展性的ti- 6al - 4v合金

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02151-y

He Wang, Yingxiang Yang, Zhongxue Feng, Kai Wang, Yueyi Wang, Min Chen, Xuyang Liu, Xuefeng Zhang, Xiaoqi Wang, Huarong Qi, Qingnan Shi, Jianhong Yi

{"title":"Preparation of Ti-6Al-4 V Alloy with Excellent Ductility by Combining Multi-Directional Isothermal Forging and Warm Rolling","authors":"He Wang, Yingxiang Yang, Zhongxue Feng, Kai Wang, Yueyi Wang, Min Chen, Xuyang Liu, Xuefeng Zhang, Xiaoqi Wang, Huarong Qi, Qingnan Shi, Jianhong Yi","doi":"10.1007/s12540-025-02151-y","DOIUrl":"10.1007/s12540-025-02151-y","url":null,"abstract":"<div><p>The experimental material used in this study was annealed Ti-6Al-4 V alloy. The microstructural evolution, mechanical properties, and recrystallization behavior of Ti-6Al-4 V alloy prepared by the combined process of multi-directional isothermal forging (MDIF) and warm rolling (WR) were investigated. The results show that the combined process can significantly improve the ductility of the alloy while maintaining good strength. As the rolling reduction increases, the grain size first increases and then decreases. A well-distributed Ti-6Al-4 V alloy is obtained at a reduction of 80%, with grain size being the main factor affecting ductility. At a reduction of 80%, the ductility of the alloy reaches its highest level, with an elongation after fracture of 18.46%, while maintaining tensile strength comparable to that of the original alloy. EBSD analysis indicates that discontinuous dynamic recrystallization (DDRX) is the dominant mechanism during warm rolling, as confirmed by low accumulated misorientation (< 15°). The proportion of recrystallized grains reaches its maximum at a reduction of 60%, and then decreases with further increases in reduction. The combination of multi-directional isothermal forging and warm rolling provides a promising method for improving the strength-ductility balance of Ti-6Al-4 V alloy and offers new insights for the manufacturing of high-performance titanium alloys.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"3250 - 3263"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Yb Addition on the Microstructure, Mechanical Properties and Flame Resistance of Mg–Gd–Y–Zn Alloys 添加Yb对Mg-Gd-Y-Zn合金组织、力学性能和阻燃性的影响

IF 4.5 3区材料科学

Metals and Materials International Pub Date : 2026-03-17 DOI: 10.1007/s12540-025-02149-6

Shuai Zhou, Jonghyun Kim, Zhaobin Zhang, Yu Cao, Taekyung Lee, Bin Jiang

{"title":"Effect of Yb Addition on the Microstructure, Mechanical Properties and Flame Resistance of Mg–Gd–Y–Zn Alloys","authors":"Shuai Zhou, Jonghyun Kim, Zhaobin Zhang, Yu Cao, Taekyung Lee, Bin Jiang","doi":"10.1007/s12540-025-02149-6","DOIUrl":"10.1007/s12540-025-02149-6","url":null,"abstract":"<div><p>The effects of Yb on the microstructure, mechanical properties, and flame resistances of the Mg–Gd–Y–Zn alloys were systematically investigated in this research. The results indicated that the Yb-free alloy mainly consisted of an α-Mg matrix and LPSO phases, while the Mg5RE phases were formed after the addition of Yb. As the Yb content increased, the volume fractions of the LPSO phases decreased while the volume fractions of the Mg<sub>5</sub>RE phases increased. After heat treatment, partial LPSO phases changed from blocky to lamellar, and Mg<sub>5</sub>RE phases changed from reticular to blocky. During the extrusion process, the addition of Yb effectively inhibited dynamic recrystallization of the alloy, refined the grains, and improved the strength of the alloy. The Yb addition also caused the outermost layer of the oxide film to form a thin and dense Yb<sub>2</sub>O<sub>3</sub> layer, which prevented internal oxidation, thereby reducing the residual compressive stress of the oxide film and improving flame resistance. The Mg–1Gd–1Y–1Zn–1Yb alloy exhibited the best comprehensive performance, with a yield strength, ultimate tensile strength, elongation, and ignition temperature of 330 MPa, 360 MPa, 7.0%, and 850 °C, respectively.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"32 9","pages":"3234 - 3249"},"PeriodicalIF":4.5,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148661966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0